Exothermic reaction in eutectoid Zn-Al based alloys

被引：28

作者：

Zhu, YH ^{[1
]}

Man, HC

Lee, WB

机构：

[1] Univ Nacl Autonoma Mexico, Inst Invest Mat, Apart P 70-360, Mexico City 04510, DF, Mexico

[2] Hong Kong Polytech Univ, Dept Mfg Engn, Hong Kong, Peoples R China

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 1999年 / 268卷 / 1-2期

关键词：

Zn-Al alloys; exothermic reaction; scanning electron microscopy;

D O I：

10.1016/S0921-5093(99)00072-6

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Both solution treated and quench-aged eutectoid Zn-Al based alloys (ZnAl20Cu3Si2 and ZnAl22Cu2 in wt.%) were studied by differential scanning calorimeter (DSC), X-ray diffraction (XRD) and scanning electron microscopy (SEM) techniques. An exothermic phenomenon was observed at the early stage of ageing. Similar behavior was also found for the cast eutectoid Zn-Al alloy. The activation energy for the exothermic phenomenon was calculated, which was in a good agreement with that derived from X-ray diffraction examination for the decomposition of the supersaturated beta'(s) phase in the eutectoid Zn-Al based alloy. It is concluded that the decomposition of the beta'(s) phase is an exothermic solid state reaction in the eutectoid Zn-Al based alloys. (C) 1999 Published by Elsevier Science S.A. All rights reserved.

引用

页码：147 / 153

页数：7

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